Interceptor



Patented Oct. l, 1.940

PATENT 'OFFICE INTERCEPTOR Robert n. sbonk, Erie, Pa., assignor to J. A. zum

Manufacturing Company, Erie, Pa., a corporationof Pennsylvania Application November 5, 1937, serial No. 172,979

4 Claims.

This invention relates generally to interceptors for'sollds in a drainage system and more particulary to grease interceptors for a 'drainage line.

All devices of this character made according to '5- the prior art, and with which I am familiar, permitted the Waste Water to pass through the grease interceptor at a high velocity resulting in the passage of the grease directly through the interceptor without eliminating any appreciable amount of grease from the waste water. The constructions of many of these prior interceptors were costly bothl in initial cost and in operation. Interceptors must be necessarily eicient in order to be of practical value. The grease also 715' clings to the side of the drainage pipes and causes Anotherobject of my invention is to providefa 30 grease interceptor which intercepts the full grease content of the waste water passing through the drain.

Another object of my invention is to provide a grease `interceptor which controls the velocity of 35. the water passing therethrough. l

Another object of my invention is to provide a grease interceptor which has means for equalizing the pressure of the Waste water passing therethrough.

Other objects of my invention will become evident from the following detailed description, taken in conjunction with 'the accompanying drawing, in which 4' Fig. 1 is a side elevational view in section of my novel grease interceptor.

Fig. 2 is a view taken on the line 2--2 of Fig. 1. Fig.'3 is a view taken onthe line 3-3 of Fig. 1.

Fig. 4 is a view taken on the line 4-4 of Fig. 1.

Fig. 5 is a sectional view showing the vertical 50 basket portion with slots.

Fig. 6 is a side elevational view of a basket which is separate from the cover of the interceptor and which has a handle for removal thereof.

u Referring to the drawing, Fig. 1 shows a casing I having legs 2 and a cover 3. An inlet 4 enters the casing at one end near the lower portion thereof and an outlet 5 discharges the lluid from the casing I. A drain aperture 6 having a drain plug 'I is disposed in the bottom portion of the 5 casing I for removing the sediment, solids, grease, and the like which settle in the declining bottom 8 of the casing I. A baille Wall 9 is disposed traversely of the casing I and an aperture II) in the lower portion thereof permits the flow of W- luid thereunder to the outlet 5.

A perforated basket depends from the cover 3 and comprises a perforated horizontal baille plate II having anged sides I2 and a perforated veruoa1 bame plate I3 disposed in the path of the "5 incoming water. A supporting memberv I4 depends from the cover 3 and supportsone end of the bottom portion Il. The bottom portion II and Vertical portion I3 of the basket fit snugly into the casing I. f

Practically no water will seep through between the walls of the cas-ing I and the bottom and vertical portions II and I3 of the basket. It is evident that the integrally connected basket is removed from the casing I when the cover 3 is re- 25 moved. The cover 3 is so designed that when it is seated on the casing I, the basket depends therefrom in its operative position in the casing I. A cleanout cover'l5 is provided to clean out the passage leading to the discharge outlet 5.

The vertical baille plate I3 of the basket has an unperforated portion I6 directly in front of the inlet 4 and the perforations Il therein increase in size as the distance from the inlet 4 increases in order that pressure of the waste water coming into the casing I is equalized in its passage through the interceptor or casing I. The velocity of the water is greatly retarded upon striking the unperforated portion of the baille plate I3 in that it must change its direction of.flow. Upon passage through the perforated portion of the baille plate I3 the Water pressure becomes practically equalized thereby permitting congelation of the grease in the waste water which rises to the surface of the water in the casing I. The perforatedportions of the baille plates II and I3 separate allsolids from the Wastewater as well as grease and like substances before the water passes to the outlet 5. The horizontal baille plate Il separates all grease and other sediment from the waste water which is not separated therefrom by the baille plate I3. The perforations I8 in the horizontal baille plate I I increase in size as the distance from theinlet 4 increases thereby further equalizing the pressure of the water pass- 5l ing through the interceptor. It will be evident that the perforations I1 and I8 in the baille plates II and I3 may be in the ferm of slots as shown at I9 in Fig. 5. The variation inthe size 5 of the perforations I1 and I8 is not absolutely necessary for the successful operation of my novel invention nor is the unperforated portion I6 in the baifle plate I3 necessary for successful operation' since very small perforations (not 10 shown) might be provided at this point and produce a similar result. The baie plate I3 has a portion 20 thereofunperforated in order that grease collected on the surface of the water in the casing I is retained and withdrawn when the l5 cover 3 is removed.

In operation, the waste water or like liquid passes into the inlet I and strikes the unperforated portion lII; of the bale plate I3 causing the water to change its direction of flow and 20 thereby greatly retarding its velocity. 'Ihe water then passes through the perforations I1 in the baille plate I3 causing an equalization of the pressure of the water :and permitting separation of the sediment and grease therefrom and con- 25 gealment of the grease in the waste water where- `by it oats on the surface of the waterin the casing I and is removed upon removal of the cover 3. A further separation of grease and sediment remaining in the waste water or like liquid 30 takes place when the waste water or other liquid passes through the horizontal baleplate I I. The portion 20 of the baille plate I3, which is unperforated, retains the grease on the surface o f the water in the casing I.

36 tendency to clog up the perforations I1 and I8 in the baille plates 'II and I3 but this can serve to inform the operator to remove the basket for cleaning. l

Fig. 6 shows a basket for disposal in the casing I of the interceptor which is independent of the cover 3. The vertical and horizontal baille plates 2| and 22 are positioned in the casing I the same as the baille plates I I and I3. A handle 23 which is also utilized to support the baiie plates 2| and 45` 22, permits easy removal thereof from the casing I to remove the collected grease. Any form of 'handle may be used.

vIt will be evident thatI have provided an interceptor for grease and other sediment which fully 60 intercepts the grease and other sediment, which f is easy to clean, which permits easy removal of The grease may have a collected grease, which is cheap in cost and maintenance, and which provides a means for ascertaining when the interceptor is full of grease or .other sediment.

Various changes may be made in the specific 5 embodiment of the present invention without departing from the spirit thereof, or from the scope of the appended claims.

What I claim is: y y

1. An interceptor for grease and sediment coml0 prising a casing having an inlet and an outlet for liquid, a substantially vertical baffle plate disposed in the path of the liquid entering said casing and having perforations for equalizing the pressure of the liquid passing into said casing and separating solid matter therefrom, said plate having a portion thereof directly adjacent said inlet, unperforated, and a substantially horizontal bame plate in said casing for further separatingv solid matter from said matter passing through said casing, and an opening in said casing for removing sediment therefrom. Y

2. A device of the class described comprising a casing having an inlet and an outlet for liquid,

a perforated plate disposed in the path of liquid passing into said casing through said inlet for equalizing the pressure of said liquid passingv through said casing thereby permitting increased 'congealing of grease in said liquid, the upper portion of said plate above the water line of said casing being unperforated to restrain escape of grease on the surface of the Water in said casing.

3. An interceptor for grease and sediment comprising a casing having an inlet and an outlet for liquid, a substantially vertical baile plate disposed in the path of liquid entering said casing and having perforations for equalizing the pressure of the liquid passing into said casing and separating solid matter therefrom, a substantially horizontal perforated baille plate in said casing' for o further separating solid matter from said liquid passing through said casing, and a cleanout opening in said casing for removing sediment therefrom.

4. An interceptor as claimed in claim 3 Where- 45 in the casing has the bottom portion thereof de-v clining away from the inlet opening to facilitate passage of the sediment to a position where it may be removed from the casing.

Y ROBERT H. SHENK. 

